Improvement in man-holes and covers



T- KERR. Manhole and Cover.'

No. 201,349. Pa'te'nted March 19,1878.

III I Wit 7165585 1 1 Inven'l'br N PETERS, PHQTO-LITHQGRAPHER. WASmNTOND C.

To all whom 'it may concern:

UNITED STATES PATENT ()F'FIGE.

THOMAS KERR, OF MILWAUKEE, WISCONSIN.

IMPROVEMENT IN MAN-HOLES AND COVERS.

Specification forming part of Letters Patent No. 201,349, dated March19, 1878; application filed July 20, 1877.

Be it known that I, THOMAS KERR, of the city and county of Milwaukee,State of Wisconsin, have invented a new and Improved Man-Hole and Cover;and I do hereby declare the following to be a full, clear, and exactdescription thereof, reference being had to the accompanying drawing,making a part of this specification, in which- Figure 1 is a perspectiveview of the manhole in place in the street-pavement. Fig. 2 is avertical section of the pan or thimble filled with pavement. Fig. 4 is aplan of the same. Fig. 3 is a vertical section of the complex tube. Fig.5 is a plan of the same. Fig. 6 is a vertical section of the man-holecover and chimney of the sewer when connected.

Like letters of reference indicate like parts in each.

This invention is designed for and adapted to sewers, or to anysubterraneous or other opening or excavation. Its object and design areto form a ready, safe, and convenient cover and man-hole or chimney forsewers or any under-ground or other place. It is made principally ofiron, steel, brass, or other metal, or of vulcanizedmaterial, combinedwith wood, rubber, cement, or other composition, presented to thesurface, and suitable to be traveled on and over without danger ofinjury either to the man-hole cover or to the traveler over it. Its formmay be circular, square, parallelogrammic, pentagonal, or polygonal. Itconsists of a complex tube or pipe, Figs. 3 and 5, composed of what aredenominated the upper section A and lower section B, as shown in theaccompanying drawing, which sections are united and molded in one piece,with flange O surrounding it at a proper distance-say, six or ten inchesfrom the top of the upper sectionand of proper thickness or width-say,three-eighths of an inch to one inchand produced or extended from saidtube or pipe at the division point or line between the said upper andlower sections thereof, so as to form a continuous shoulder or narrowplatform around said tube or pipe at the junction of said upper andlower sections, and at the division point or line between them,

. said shoulder or platform being at right angles with said complex tubeor pipe. The upper section of said complex tube or pipe is, say, fromone to three inches greater in diameter than the lower section, so thatat the junction of said sections there is an interior shoulder orplatform, D, projecting from the interior surface toward the center ofthe tube or pipe. and at right angles with such surface, say from two tothree inches, on which shoulder or platform the thimble or pan-cover Eof the upper section rests, and said upper section of the tube or pipethe thimble or pan-cover completely fills.

The exterior shoulder or platform is to rest on the brick or otherfoundation, to be built up from the sewer like a chimney, which is shownat I, and the lower section of said tube or pipe is admitted into thetop of such chimney, so as to form a perfect hollow connection with thesewer.

The upper section A of said tube is designed to receive the thimble orpan-cover E, which is to rest on the interior shoulder or platform. Thisthimble or pan-cover covers the hole or orifice of the tube, and the topedge of the thimble is rounded, and projects a little over the outersurface of the tube or pipe, forming a rim, as shown at H; and when thewhole thing is set in its proper place the top edge of said thimble isabout on a level with the surface of the street or its pavement.

Such thimble or pan-cover E is filled or paved with blocks of wood, orwith rubber, composition, or any substance suitable to be traveled upon,and such thimble, when so filled or paved, presents a smooth or levelsurface, as at F, even with the surface of the street-pavement Gr.

Such thimble can be detached, removed, and replaced at pleasure. Thethimble may be constructed with or without holes in its bottom, withsmall conductor-tubes extending from such holes nearly to theeven-surface or level of the street-pavement.

The invention, properly constructed and applied, makes the man-hole assafe to be traveled over as is any other part of the street, and rendersthe sewer or other subterraneous excavation or chamber easy of ingress,egress, and regress; and as a whole it forms a complete cap and cover tothe sewer-chimney, so that the feet of horses, cattle, or other animals,or the wheels of wagons or other vehicles, will not come in contact withthe iron or other metallic cover or surface.

A section of the top of the man-hole or sewer-chimney is alsorepresented in the drawing.

I claim as my invention and desire to secure by Letters Patent- Theimproved man-hole and cover consisting of the thimble A B, provided withflange O and shoulder D, in combination with the hollow cover E, adaptedto receive paving material, substantially as shown and described.

THOMAS KERR.

Witnesses:

GEORGE W. LAKIN, OHAsE W. LAKIN.

